Vasopressors are medications used to constrict blood vessels and increase blood pressure in patients experiencing low blood pressure, often due to conditions like septic shock or cardiogenic shock. They work by stimulating receptors in the blood vessels, leading to vasoconstriction, which helps improve blood flow to vital organs. Common examples of vasopressors include norepinephrine, epinephrine, and dopamine. These drugs are typically administered in a hospital setting, often through an intravenous (IV) line, allowing for close monitoring of the patient's response and any potential side effects.